Durability: With a robust, spill-proof design, anti-fading treatment and sturdy tilt, the LogitechMK235 wireless keyboard and mouse combo is built to last Simplicity: The full-size keyboard features a standard number pad and 15 shortcut keys while the optical mouse is equipped with movement detection technology for precise control Plug & play: The mini USB-receiver included provides a reliable wireless connection up to 10 m away, with no need for pairing or software installation to use this keyboard and optical mouse combo Extended battery: Up to 3 years for the keyboard and 1 year for the mouse, depending on use 24 months manufacturer guarantee: For a worry-free user experience that ensures long-lasting performance Upgrade: To Logitech MK540 Combo for increased comfort - scooped keys, palm rest, full-size mouse with soft rubber grips and customizable shortcuts Keyboard On/off switch Yes Security algorithms 128-bit AES Keyboard keys technology Plunger Angle adjustment (min) 0° Angle ad